Timeline for Does brewing tea for longer result in higher caffeine content?
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| Feb 7, 2015 at 2:13 | comment | added | Athanasius | Where did I assume anything about constant caffeine extraction? Of course it isn't constant. There are MANY other studies out there, which I've looked at. I just cited a couple that were relevant to the question here; the 30-second decaf method isn't actually relevant, but it was brought up in other answers, so I felt I should address it. Other studies have shown 5-30% of caffeine usually is released in the first 30 seconds. In any case, this disproves the "30-second" myth which usually claims 80-85% extraction. And real "decaf tea" by law must usually have 95-98% or more removed. | |
| Feb 4, 2015 at 15:59 | comment | added | user33287 | the 2008 study says nothing of the speed at which the caffeine is extracted, since tea was steeped for 3 minutes, not less. It doesn't disprove at all the idea that most of the caffeine is extracted during the first 30-45s. Why would you assume that the speed of extraction during the first 3 minutes was constant? What IS certainly a myth, is that ALL of the caffeine is extracted during the first 30s. All studies show that even after a 3-5 minutes infusion, there is still between 10 to 25% of caffeine left since that's what comes out in a second infusion. | |
| Apr 10, 2014 at 16:51 | history | answered | Athanasius | CC BY-SA 3.0 |